Valve.



PATENTED SEPT. 24, 1907.

B. 0. DUN.

VALVE. APPLICATION FILED NOV. 22. 1906.

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VALVE.

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UNITED- STATES PATENT OFFICE.

EFFINGHAM O. DUN, OF SEWAREN, NEW JERSEY.

VALVE.

Specification of Letters Patent.

Patented Sept. 24, 1907.

Application filedhlovember 22,1906. Serial No. 344,619.

or liquids, steam traps and stop valves, by slight modifications which will readily suggest themselves to the skilled mechanic in adapting the invention to the particular use and special type of valve, regulator, or the like.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result, reference is to be had to the following description and accompanying drawings.

While the invention may be adapted to different forms and conditions by changes in the structure and minor details without departing from the spirit or essential features thereof, still the preferred embodiment is shown in the accompanying drawings, in which:

Figure 1 is a vertical central longitudinal section of a pressure regulating valve embodying the invention. Fig. 2 is a horizontal section thereof on the line x-x of Fig. 1. Fig. 3 is a sectional detail of the valve chamber and a portion of the valve casing. Fig. 4 is a detail view in elevation of the piston valve. Fig. 5 is a vertical central section of a pressure regulator for water or air pumps embodying the invention. Fig; 6 is a detail view showing the application of the invention to a water level regulator for pumps.

Corresponding and like parts are referred to in the following'description and indicated in all the views of the drawings by the same reference characters] The valve in its general construction, no matter what may be its specific adaptation, comprises a valve casing 1 provided with a suitable inlet 2 and an outlet 3. A valve seat 4 is located within the valve casing and is suitably supported therein and is provided with one or more ports 5 in its sides, said port or ports being in communication with the inlet 2. The valve seat 4 is of cylindrical form and the bore or opening therethrough is of uniform diameter. While it is preferred to construct the valve seat separately from the valve casing and support the same therein in any convenient, economical and substantial way, nevertheless, it is to be understood that it may form a part of said valve casing. One or more passages 6 connect the port or ports 5 of the valve seat with the inlet 2. As shown the val veseat 4 is a sleeve, bushing, or short tube and is held in place within the valve casing by means of bars 7 and 8.

' The bar 7 is arranged crosswise of the valve casing and is supported at its ends by the sides thereof, a space being left above and below the said cross bar. The bar 8 is vertically arranged and is supported at its ends by the top and bottom portions of the valve casing, said vertical bar being centrally disposed and having the passages 6 upon opposite sides thereof. The valve seat may be connected to the cross bar 7 and the vertical bar Sin any substantial way. To admit of placing the valve seat in position, an opening is formed in a sideof the valve casing and this opening is closed by means of a plug 9, the position of the opening and plug depend- .ing upon the particular form of the valve.

A piston valve 10 is slidably fitted within the valve seat and one or both ends are recessed and one or more ports 11 are provided in the sides thereof and communicate with the recesses formed in the ends of said piston valve. The ports 11 of the piston valve register with the ports 5 of the valve seat 4 and are so positioned as to admit of the ports 5 being opened or closed as may be required in the operation of the valve. The piston valve 10 may be of any suitable construction and snugly fits within the valve seat so as to insure closing of the ports 5 thereof when necessary in the successful operation of the valve. The ports 5 and 11 may be of any form depending upon the nature of the fluid, or liquid, to be controlled and the special work to be performed. Suitable stop means cooperate with the piston valve to insure the same occupying a predetermined position when the valve is in normal condition. A stem 12 projects from the valve 10 and may be connected thereto in any way. In the preferred construction, the piston valve 10 is formed with a central opening into which an end of the stem 12 is fitted and secured.

A tubular portion 13 projects from the valve casing in axial alinement with the valve seat and constitutes a cylinder and preferably forms a part of the valve casing, although it may be separate therefrom and attached thereto in any manner.

A piston 14 is arranged to operate in the cylinder 13 and is mounted upon the valve stem 12 so as to move synchronously with the piston valve 10. The piston 14 is acted upon by two oppositely disposed forces, the one being fixed and the other represented by the pressure Within the valve casing. The preponderance of the one or the other of said forces determines the relative position of piston valve 10 and the amount of the port or ports 5 to be uncovered. One of such forces may be represented by the tension of a spring, the force exerted by a weight or the combined action of both a spring and weight, the latter being indicated lated by suitable adjusting means. The piston may consist of a single member, Figs. 1 and 6, or, of spaced members, Fig. 5.

A stem 16 projects from the piston 14 and passes through the head of the cylinder 13 and through a bar 17, the latter being connected to the head 18 of the cylinder by means of rods 19, the upper or outer ends of said rods being threaded to receive set nuts 20. A stop 21 is provided upon the stem 16 and is adapted to engage with the head 18 and limit the inward or downward movement of the piston 14 and the piston valve 10. The spring 15 surrounds the projecting portion of the stem 16 and is confined between the bar 1'7 and the stop 21 and exerts a downward, or inward pressure upon the stem 16 to hold the piston valve in a given position. The upper portion of the stem 16 is made angular and the opening in the bar 17 through which said stem operates is made of corresponding shape to prevent turning of the stem and the piston valve 10, thereby insuring registry of; the ports 5 and 11. The head 18 closing the outer end of the cylinder 13 is constructed in halves or similar sections admitting ot fitting the same about the stem 16 below the stop 21,

said head being bolted to an outer flange of the cylin- (ler 13.

In the construction shown in Fig. 5, the stem 16 and parts 17 and 19 are dispensed with and a spring 22 corresponding to the spring 15 is arranged within the cylinder 13 and confined between the outer member of the piston 14 and a pressure piece 23, the latter being adjusted by means of a set screw 24 threaded into the head or end 25 closing said cylinder 13. A pipe 26 having pet cock 27 connects with a column, tank or receiver according to the nature of the pressure desired upon the end of the piston remote from the interioro'i the valve casing.

A vent 28 is provided in a side of the cylinder 13 opposite the space formed between the members of the piston 14, thereby maintaining a uniform pressure upon the spaced members or parts of the piston even though either should leak. A set screw 29 threaded into a side of the valve casing constitutes a stop to limit the movement of the piston valve 10 in one direction and corresponds to the stop 21.

In the construction shown in Fig. 6 the stem 16 has communication with a weight, or float, 30 which is provided at one end of a lever 31, said lever being connected to the stem 16 by means of a chain 32, or I other analogous means. The float 30 is arranged to operate in a tank 33 and is affected by the change of level of the water contained in said tank, said float being caused to rise, or float according as the level of the water falls below a given point, or rises.

It is to be understood that the spring 15 may be dispensed with in this arrangement or may supplement the ac-f tionof the float or weight.

In the practical embodiment of the invention, the valve casing is included in a length of piping through which steam, gas, liquid or other fluid medium is said piston 14 constitute governor means for the equalmentioned ports izing means. The'spring 15, or equivalent means, constitute the resistance to the pressure of the lluid passing through the valve casing and acting upon the piston 14, said resistance being properly adjusted and when balanced by the pressure acting upon the piston 14 from within, the valve casing represents the (diet 'tivc force adapted to be applied by the medium passing from the valve casing. Should the force acting upon the piston 14 overcome the resistance of the spring 15, the latter will yield proportionately to the excess of internal pressure and permit the governing piston l-t and the piston valve 10 to move so as to decrease the area of the port or ports 5, thereby shutting oil" a part of the supply and diminishing the internal pressure with the result that while a less amount oi fluid medium is admitted to the valve casing the effective pressure thereof in the pump trap, or other part, corresponds to that for which the valve is set. The positionol the piston valve 10 is determined by the pressure exerted upon the opposite ends oi the piston 14 and under normal conditions, the piston 10 will occupy a given or initial position, but in the event of the internal pressure within the valve casing exceeding the resistance or tension 01'' the spring 15, or like part, the piston valve 10 will move a distance proportionately to the degree oi pressure exerted upon the inner end of the governing piston 14 and thereby shut ofi an amount ol the supply corresponding to the excess of pressure, thereby rendering the pressure approximately unilorm at the outlet 3. The operation of the valve is substantially the same whether its delivery end is connected with a vacuum, pump or other mechanical device or appliance adapted to have a uniform pressure maintained.

Having thus described the invention, what is claimed as new is:

1. In a valve of the character described, the combination of a valve casing provided with an inlet and an outlet said inlet being divided into two passages, a cylindrical valve seat mounted within the casing and provided with a pair of oppositely disposed ports communicating with the before mentioned passages, a piston slidably mounted within the said cylindrical valve seat and provided in its sides with oppositely arranged ports corresponding to the before in the valve seat and communicating with the interior of the valve casing through an end of the piston, and means for moving said piston to vary the effective size of the ports in the valve seat. I

2. 'In a valve of the character described, the combination of a valve casing formed with an inlet and an outlet, a valve seat arranged within the casing and having ports formed in the sides thereof, transverse bars supporting the valve seat, one of said bars extending across the inlet, passages being located upon opposite sides of the said bar leading to the before mentioned ports in the valve casing, a valve member operating within the valve seat, and means for controlling the valve member to vary the etlfective size of the ports in the valve seat.

3. In a valve of the character described, the combination of a valve casing provided with an inlet and an outlet and having an interior ported valve seat and :1 cylinder in axial nlinement, a ported piston valve operating within the valve seat, a governor piston arranged in said cylinder, a stem connecting the two pistons, a second stem projecting from the governor piston, and a spring cooperating with the second stem to produce a pressure tending to open the valve.

4. In a valve of the variety specified, the combination of a valve casing provided with an inlet and an outlet and having an interior ported valve seat and a cylinder in axial alinement, a ported piston valve located within the valve seat, a governor piston arranged in said cylinder, a stem connecting the two pistons, a second stem projected from the governor piston, means codperating with said second stem to limit the movements of the pistons in one direction, a spring exerting an inward pressure upon said second stem and means cooperating with the said second stem to prevent relative turning thereof to insure registry of the ports of the valve seat and piston valve.

5. In a valve of the character specified, the combination of a valve casing provided with an inlet and an outlet, a cylindrical valve seat arranged within the casing and provided with side ports, a cylinder carried by the casing and in axial alinement with the valve seat, a ported piston valve operating within the valve seat, a governor piston arranged within the cylinder, connecting means between the governor piston and piston valve, a stem projecting from the governor piston and carrying a stop limiting the movement of the valve, and a spring cooperating with the stop to normally hold the valve in an open position.

6. In a valve of the character described, the combination of a valve casing provided with an inlet and an outlet, a ported valve seat mounted within the valve casing and communicating with the inlet, a cylinder carried by the valve casing, a valve operating within the valve seat, a piston located within the said cylinder, connecting means between the valve and piston, rods extending from the cylinder head, a cross bar adjustably mounted upon the said, rods, a stem projecting from the piston and engaging the said cross bar, and a spring cooperating with the stem to normally hold the valve in an open position.

7. In a valve of the character set forth, the combination of a valve casing, a valve seat mounted within the casing, a governor piston mounted withinthe cylinder, connecting means between the governor piston and the valve, rods extending from the cylinder, a cross bar carried by the rods, a stem connected to the governor piston and engaging the said cross bar, a stop carried by the stem to limit the movement of the valve, and a spring interposed between the stop and cross bar and operating to normally hold the valve in an open position.

In testimony whereof I afdx my signature in presence of two witnesses.

EFEINGHAM C. DUN. [13. s.] Witnesses:

ERNEST ALLEN, TOWNSEND CARPENTER. 

